Damper control for heat units



April 16, 1929f 5 SCOTT 1,709,193

DAMPER GQNTROL FOR HEAT UNITS Filed Jan. 16, 1928 2 Sheets-Sheet l April16, 1929. c. E. SCOTT DAMPER CONTROL FOR HEAT UNITS 2 Sheets-Sheet 2zzwwzfi a 6/17 01 0 if Jam? Filed Jan. 16, 1928 gr/f/bflifc/zn 1.4 M

Patentfd Apr. 16, 1929.

UNITED STATES PATENT OFFICE.

CLIFFORD E. SCOTT, OF MINNEAPOLIS, MINNESOTA, ASSIGNOIR TO MCQUAYRADIATOR CORPORATION, OF MINNEAPOLIS, MINNESOTA, A CORPORATION 01DELAWARE.

DAMPER CONTROL FOR HEAT UNITS.

Application filed January 16, 1928. Serial No. 247,160;

My present invention has for its object the provision of a simple andhighly efiicient damper control for a heat unit in a heating systemusing any desired heat exchange medium such as vapor, steam or hotwater. Said heat unit may be of the tubular or cellular type of radiatorand, as is well known, very little heat exchange takes place from aradiator of this type without the use of either a natural or a forceddraft. By the use of my damper control, this draft may be partially orentirely cut off so that the heat exchange that takes place may becontrolled, at will.

To the above end, generally stated, the invention consists of the noveldevices and combinations of devices hereinafter described and defined inthe claims.

In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings:

Fig. v1 is a view principally in front elevation of a heat unit andcabinet therefor having the invention embodied theren;

Fig. 2 is a view partly in side elevation and partly in vertical sectiontaken on the line 2-2 of Fig. 1 and further illustrating in diagram thewall and floor of a building; and

Fig. 3 is a perspective view of the heat unit removed from the cabinet.

The numerals 4 and 5 indicate, respectively and diagrammatically, thefloor and wall of a building and the numeral 6 indicates a heat exchangeunit of a heating system. This heat unit 6 is in the form of a cellularor tubular radiator supported on legs 7 from the floor 4 with its airpassages Vertically arranged.

Surrounding the heat unit 6 is a sheet metal cabinet or stack 8. Thisheat unit 6 has at its lower end a cold air intake passage 9 whichextends through the wall 5 at one side thereof. The legs 7 support theheat unit 8 with its bottom substantially at the same elevation as thetop of the cold air intake passage 9.

The upper end portion of the heat cabinet 8 is curved laterally toaiford a hot air discharge passage 10 which opens through the upwardthrough said unit. A grill 11 covers the hot air discharge passage 10and is flush with the respective side of the wall 5.

The heat control which is the subject matter of thepresent invention,includes a damper 12 which, as shown, is in the form of a flat sheetmetal plate hinged at 13 to the bottom of the heat unit 6- at the backthereof. This damper plate 12 is loosely hinged and normally hangs in anopen position under the action of gravity. When the damper 12 is raisedinto horizontal position against the bottom of the heat unit 6, itcompletely closes the air passages therein and shuts off the draftthrough the cabinet 8.

For raising the damper plate 13 to artially or completely close the heatunit, tliere is provided a foot lever 14 intermediately pivoted by anut-equipped bolt 15 to a bearing 16 on the under side of the heat unit6 at the front thereof. The short or inner end of the foot lever 14extends through a notch 17 in the free longitudinal edge portion of thedamper plate 12 and is providedwith a crossed pin 18 arranged to engagethe under side of the damper plate 12 when the inner end portion of saidlever is raised to move the damper plate 12 from an open to a closedposition. The outer end portion of the lever 14 extends obliquelyoutward through the air intake passage 9 so that the same may be engagcdby the foot of an operator and depressed to partially or completelyclose the damper 12. The pivotal action between the foot lever 14 andbearing 16 has sufficient friction to hold said foot lever where set.This friction, as shown, is produced by a spring washer 19 on the pivotbolt 15. Obviously, by depressing the outer end portion of the footlever 14, the damper plate 12 may be partially or completely closed andthe lever 14 will remain where set and thus hold the damper late 12.

mm the above description it is evident that by the use of the dampercontrol the heat exchange from the heat unit may be controlled, at will.

What I claim is:

1. The combination with a heat unit having air passages and a stackleading therefrom, of a damper hinged to the heat unit for verticalswinging movement to and from a closed position in which it underliesthe heat unit and closes the air passages, said damper plate beingloosely hinged forswingingmovementinto an open position under the actionof gravity, and a lever for raising the damper plate and holding thesame where set.

2. The structure defined in claim 1 in which CLIFFORD E. SCOTT.

